CN113457954A - System and method for processing super-hydrophobic surface by laser - Google Patents

System and method for processing super-hydrophobic surface by laser Download PDF

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Publication number
CN113457954A
CN113457954A CN202110797012.1A CN202110797012A CN113457954A CN 113457954 A CN113457954 A CN 113457954A CN 202110797012 A CN202110797012 A CN 202110797012A CN 113457954 A CN113457954 A CN 113457954A
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laser
module
spraying
galvanometer
mechanical arm
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CN202110797012.1A
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CN113457954B (en
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韩坤
蔡鑫
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Ningbo Qiyun New Material Technology Co ltd
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Ningbo Qiyun New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0823—Devices involving rotation of the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2506/00—Halogenated polymers
    • B05D2506/10—Fluorinated polymers
    • B05D2506/15—Polytetrafluoroethylene [PTFE]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/28—Metals

Abstract

The invention relates to a system and a method for processing a super-hydrophobic surface by laser. The device is provided with a combination device with a plurality of functions of laser irradiation, scribing and spraying, can realize the functions of irradiation and scribing by using one galvanometer module, and can realize the super-hydrophobic processing of the surfaces of metal and resin materials by combining with a spraying module, and the hydrophobic performance is better than that of a single Teflon coating after the processing is finished; the processed material is protected by the primer, so that on one hand, the Teflon coating is not easy to fall off and has good bonding performance, and on the other hand, the primer plays a role in protecting the Teflon coating from falling off and can be further protected by the primer to prevent corrosion; a unique processing mode is adopted, and only one device is used, so that the surface modification of the material, the surface modification of the primer and the surface modification of the Teflon coating are realized; the processing effect is good, transfer drying is not needed midway, and the processing efficiency is higher.

Description

System and method for processing super-hydrophobic surface by laser
Technical Field
The invention relates to the field of laser material processing, in particular to a system and a method for processing a super-hydrophobic surface by laser.
Background
The super-hydrophobic material is a novel material, can clean places needing cleaning by self, and can be placed on the surface of metal to prevent external corrosion. In the prior art, a Teflon coating can be carried out on the surface of a material to realize a hydrophobic effect; but the Teflon coating has poor combination effect and is easy to fall off, and the surface of the material after falling off is exposed and easy to corrode;
in addition, teflon itself has limited hydrophobic properties, and there is a need in the art to further improve the hydrophobic properties to improve the self-cleaning properties of the material surface.
Application number CN201910082352.9 discloses a method for preparing a super-hydrophobic coating by laser printing, which is to prepare a super-hydrophobic nano compound by hydrolyzing and condensing organosilane and nano particles; then mixing and ball-milling the super-hydrophobic nano composite, the resin and the carbon powder to obtain uniform super-hydrophobic carbon powder; and then loading the super-hydrophobic carbon powder into a selenium drum of a laser printer, and printing the super-hydrophobic carbon powder on common printing paper by the laser printer to obtain the super-hydrophobic coating. The super-hydrophobic coating prepared by printing has excellent performance (the contact angle of 5 mu L water drop is more than 155 degrees, and the rolling angle is less than 8 degrees), but the material printed on paper is not easy to use on a large scale, and the bonding performance of the material and metal is not good, so that the super-hydrophobic coating is not suitable for outdoor use.
Application number CN201410029031.X discloses a Teflon spraying process, which comprises the steps of soaking for 30-50 min by using an organic solvent, heating, and removing grease impurities on the surface of an object to be coated; then, washing the organic solvent on the surface of the article by using clean water, cleaning the residual impurities on the surface of the article by adopting a mechanical mode of sand blasting treatment, and enabling the surface of the article to be rough; spraying a primer after the roughening step; and finally, spraying a Teflon layer. The processing process is complicated, the transfer is needed for many times in the processing process, and the surface hydrophobicity of the processed Teflon is limited.
Further, at present, the general laser modification of teflon is a teflon-based solid material, and no equipment or method for performing hydrophobic modification on the surface of the teflon coating exists.
Disclosure of Invention
In order to solve the above problems, a system for laser processing a superhydrophobic surface is provided, which includes a laser, a rotation station, a laser galvanometer module, a spraying module, an irradiation mechanical arm module and a spraying mechanical arm module;
the laser device is connected with the laser galvanometer module, and the laser galvanometer module is used for providing laser defocusing irradiation and laser scribing for the surface of a material to be processed placed on the rotary station; the spraying module is used for providing primer spraying and Teflon coating spraying to the surface of the material to be processed placed on the rotating station; the laser galvanometer module is arranged on the irradiation mechanical arm module, the spraying module is arranged on the spraying mechanical arm module, and the rotating station can drive a material to be processed placed on the rotating station to horizontally rotate around the center of the rotating station; the irradiation mechanical arm module, the spraying mechanical arm module and the rotating station are mutually matched, so that the laser galvanometer module and the spraying module can cover the surface of a material to be processed placed on the rotating station.
The laser is an infrared pulse laser, the laser wavelength is 1064nm, the pulse frequency and the pulse width are adjustable, the pulse frequency is 1 kHz-60 kHz, the pulse width is 1 ns-200 ns, and the output power is 100W-2000W.
The laser galvanometer module comprises a laser galvanometer and a focusing lens, and the focusing lens is arranged at a light outlet of the laser galvanometer and is used for focusing laser output by the laser galvanometer to realize defocusing irradiation and laser scribing under focusing;
the laser galvanometer module and the laser are connected by optical fibers.
A primer storage tank and a Teflon storage tank are arranged in the spraying module, liquid primer is stored in the primer storage tank, and Teflon spraying liquid mixed with a solvent is stored in the Teflon storage tank; the spraying module is provided with two spray heads which are respectively used for spraying the primer and the Teflon coating.
The control module is connected with the laser, the laser galvanometer module, the spraying module, the irradiation mechanical arm module, the spraying mechanical arm module and the rotating station and is used for controlling the laser, the laser galvanometer module, the spraying module, the irradiation mechanical arm module, the spraying mechanical arm module and the rotating station;
the irradiation mechanical arm module and the spraying mechanical arm module are all 3-freedom-degree mechanical arms, and multi-angle and full-coverage spraying can be realized by matching with a rotating station.
The method for processing the superhydrophobic surface according to the system for processing the superhydrophobic surface by the laser comprises the following steps of:
step 1) horizontally placing a material to be processed on the surface of a rotary station, wherein the center of the surface to be processed of the material to be processed is superposed with the center of rotation of the rotary station as much as possible;
step 2) controlling parameters of laser output by the laser: the pulse frequency is 1kHz, the pulse width is 200ns, and the output power is 500W; controlling the focusing lens to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling an irradiation mechanical arm module and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, and repeating for 3 times to remove redundant grease on the surface of the material and roughen the surface of the material; after the surface of the material to be processed is roughened, when primer spraying is carried out next step, the surface bonding effect of the primer and the material to be processed is improved, so that the primer is less prone to falling off;
step 3) controlling the spraying mechanical arm module to spray the primer on the surface of the material, wherein the spraying thickness is more than 200 microns; the 200-micron thin-layer primer can play a role in rust prevention on one hand, and can enable the Teflon coating to be combined more firmly on the other hand;
and 4) controlling parameters of laser output by the laser: the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 200W; controlling the focusing lens to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling an irradiation mechanical arm module and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, repeating for 3 times to dry the primer on the surface of the material and roughen the surface of the primer, and increasing the combination effect of a subsequent Teflon coating; so can be quick make the priming paint dry, practice thrift process time, owing to utilize laser to carry out the irradiation under the not dry condition of priming paint and accelerate dry moreover, the surface of priming paint is not level and smooth, and roughness is big, and the combination effect of teflon coating is better.
Step 5) controlling the spraying mechanical arm module to spray a Teflon coating on the surface of the material, wherein the spraying thickness is more than 100 microns;
and 6) controlling parameters of laser output by the laser: the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 100W; controlling the focusing lens to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling an irradiation mechanical arm module and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, and repeating for 3 times to dry the Teflon on the surface of the material; therefore, on one hand, the drying speed is higher, on the other hand, the Teflon cannot completely absorb the laser due to the thickness of 100 microns, so that a part of the laser penetrates through the Teflon to reach the surface of the primer, the Teflon generates violent oscillation on the surface of the primer, the roughness is high, and the absorption effect of the laser scribing laser in the next step is improved;
step 7) controlling parameters of laser output by the laser: the pulse frequency is 60kHz, the pulse width is 1ns, and the output power is 100W; controlling the focusing lens to be in a focusing mode, so that the laser output by the galvanometer is focused on the surface of the material; and controlling the irradiation mechanical arm module and the galvanometer to perform full-coverage scribing on the surface of the material to be processed, wherein the line width is 10-30 microns, and the line center distance is 50-100 microns, so that the hydrophobic effect of the Teflon surface is improved.
The primer is epoxy zinc-rich primer; the material to be processed is aluminum, iron or resin material.
The invention has the beneficial effects that:
the invention is provided with the combination equipment with a plurality of functions of laser irradiation, scribing and spraying, can realize the functions of irradiation and scribing by using one galvanometer module, and can realize the super-hydrophobic processing of the surfaces of metal and resin materials by combining with the spraying module, and the hydrophobic performance is better than that of a single Teflon coating after the processing is finished; the processed material is protected by the primer, so that on one hand, the Teflon coating is not easy to fall off and has good bonding performance, and on the other hand, the primer plays a role in protecting the Teflon coating from falling off and can be further protected by the primer to prevent corrosion;
a unique processing mode is adopted, and only one device is used, so that the surface modification of the material, the surface modification of the primer and the surface modification of the Teflon coating are realized; the processing effect is good, transfer drying is not needed midway, and the processing efficiency is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a sequence of various coatings of the present invention;
FIG. 3 is a graph showing the measurement of contact angle of the surface after the completion of the processing according to the present invention.
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.
Example 1:
as shown in fig. 1, a system for laser processing of a superhydrophobic surface comprises a laser 1, a rotation station 2, a laser galvanometer module 3, a spraying module 4, an irradiation mechanical arm module 5 and a spraying mechanical arm module 6;
the laser 1 is connected with a laser galvanometer module 3, and the laser galvanometer module 3 is used for providing laser defocusing irradiation and laser scribing for the surface of a material to be processed placed on the rotary station 2; the spraying module 4 is used for providing primer spraying and Teflon coating spraying to the surface of the material to be processed placed on the rotating station 2; the laser galvanometer module 3 is arranged on the irradiation mechanical arm module 5, the spraying module 4 is arranged on the spraying mechanical arm module 6, and the rotating station 2 can drive the material to be processed placed on the rotating station 2 to horizontally rotate around the center of the rotating station 2; the irradiation mechanical arm module 5, the spraying mechanical arm module 6 and the rotary station 2 are mutually matched so that the laser galvanometer module 3 and the spraying module 4 can cover the surface of the material to be processed placed on the rotary station 2.
The laser 1 is an infrared pulse laser 1, the laser wavelength is 1064nm, the pulse frequency and the pulse width are adjustable, the pulse frequency is 1 kHz-60 kHz, the pulse width is 1 ns-200 ns, and the output power is 100W-2000W.
The laser galvanometer module 3 comprises a laser galvanometer 7 and a focusing lens 8, wherein the focusing lens 8 is arranged at a light outlet of the laser galvanometer 7 and is used for focusing laser output by the laser galvanometer 7 to realize defocusing irradiation and laser scribing under focusing;
the laser galvanometer module 3 and the laser 1 are connected by optical fibers.
A primer storage tank and a Teflon storage tank are arranged in the spraying module 4, liquid primer is stored in the primer storage tank, and Teflon spraying liquid mixed with a solvent is stored in the Teflon storage tank; the spraying module 4 has two nozzles for spraying the primer and the teflon coating, respectively.
The laser control system further comprises a control module 9, wherein the control module 9 is connected with the laser 1, the laser galvanometer module 3, the spraying module 4, the irradiation mechanical arm module 5, the spraying mechanical arm module 6 and the rotating station 2 and is used for controlling the laser 1, the laser galvanometer module 3, the spraying module 4, the irradiation mechanical arm module 5, the spraying mechanical arm module 6 and the rotating station 2;
the irradiation mechanical arm module 5 and the spraying mechanical arm module 6 are all 3-freedom-degree mechanical arms, and multi-angle and full-coverage spraying can be realized by matching with the rotating station 2.
The method for processing the superhydrophobic surface according to the system for processing the superhydrophobic surface by the laser comprises the following steps of:
step 1) horizontally placing a material to be processed on the surface of a rotating station 2, wherein the center of the surface to be processed of the material to be processed is superposed with the rotating center of the rotating station 2 as much as possible;
step 2) controlling the laser 1 to output laser parameters: the pulse frequency is 1kHz, the pulse width is 200ns, and the output power is 500W; controlling the focusing lens 8 to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling the irradiation mechanical arm module 5 and the galvanometer to perform full-coverage irradiation on the surface of the material to be processed, and repeating for 3 times to remove redundant grease on the surface of the material and roughen the surface of the material;
step 3) controlling the spraying mechanical arm module 6 to spray the primer on the surface of the material, wherein the spraying thickness is more than 200 microns;
step 4) controlling the laser 1 to output laser parameters: the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 200W; controlling the focusing lens 8 to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling the irradiation mechanical arm module 5 and the galvanometer to perform full-coverage irradiation on the surface of the material to be processed, repeating for 3 times to dry the primer on the surface of the material and roughen the surface of the primer, and increasing the combination effect of the subsequent Teflon coating;
step 5) controlling the spraying mechanical arm module 6 to spray a Teflon coating on the surface of the material, wherein the spraying thickness is more than 100 microns;
step 6) controlling the laser 1 to output laser parameters: the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 100W; controlling the focusing lens 8 to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling the irradiation mechanical arm module 5 and the galvanometer to perform full-coverage irradiation on the surface of the material to be processed, and repeating for 3 times to dry the Teflon on the surface of the material;
step 7) controlling the laser 1 to output laser parameters: the pulse frequency is 60kHz, the pulse width is 1ns, and the output power is 100W; controlling the focusing lens 8 to be in a focusing mode, so that the laser output by the galvanometer is focused on the surface of the material; and controlling the irradiation mechanical arm module 5 and the galvanometer to perform full-coverage scribing on the surface of the material to be processed, wherein the line width is 10-30 microns, and the line center distance is 50-100 microns, so that the hydrophobic effect of the Teflon surface is improved.
This forms a double layer structure of primer and teflon coating on the surface of the material to be processed, as shown in fig. 2.
The primer is epoxy zinc-rich primer; the material to be processed is aluminum, iron or resin material.
The contact angle of the processed material surface is measured, and the result is shown in figure 3, so that the finished material surface has a good super-hydrophobic effect.
Example 2:
this example further improves the present invention.
The third mechanical arm is provided with a purging module which can blow out compressed air, and when defocusing irradiation is carried out, the third mechanical arm is used for synchronously purging the irradiation position, so that the temperature during irradiation is reduced, and the volatilization effect of the coating solvent is improved; when the material is irradiated, an extremely thin layer of the material on the surface can be softened and melted, and at the moment, the compressed air is used for blowing, so that the compressed air can guide the surface material to move and enhance, and the roughening effect of the surface of the material is better.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (7)

1. A system for processing a super-hydrophobic surface by laser comprises a laser (1), a rotary station (2), a laser galvanometer module (3), a spraying module (4), an irradiation mechanical arm module (5) and a spraying mechanical arm module (6); the method is characterized in that:
the laser device (1) is connected with the laser galvanometer module (3), and the laser galvanometer module (3) is used for providing laser defocusing irradiation or laser focusing scribing for the surface of a material to be processed placed on the rotary station (2); the spraying module (4) is used for providing primer spraying and Teflon coating spraying to the surface of the material to be processed placed on the rotating station (2); the laser galvanometer module (3) is installed on the irradiation mechanical arm module (5), the spraying module (4) is installed on the spraying mechanical arm module (6), and the rotating station (2) can drive a material to be processed placed on the rotating station (2) to horizontally rotate around the center of the rotating station (2); the irradiation mechanical arm module (5), the spraying mechanical arm module (6) and the rotating station (2) are mutually matched, so that the laser galvanometer module (3) and the spraying module (4) can cover the surface of a material to be processed placed on the rotating station (2).
2. The system for laser machining a superhydrophobic surface of claim 1, wherein:
the laser (1) is an infrared pulse laser (1), the laser wavelength is 1064nm, the pulse frequency and the pulse width are adjustable, the pulse frequency is 1 kHz-60 kHz, the pulse width is 1 ns-200 ns, and the output power is 100W-2000W.
3. The system for laser machining a superhydrophobic surface of claim 1, wherein:
the laser galvanometer module (3) comprises a laser galvanometer (7) and a focusing lens (8), wherein the focusing lens (8) is arranged at a light outlet of the laser galvanometer (7) and is used for focusing laser output by the laser galvanometer (7) to realize laser focusing and scribing under defocusing irradiation or focusing of the laser;
the laser galvanometer module (3) and the laser (1) are connected by optical fibers.
4. The system for laser machining a superhydrophobic surface of claim 1, wherein:
a primer storage tank and a Teflon storage tank are arranged in the spraying module (4), liquid primer is stored in the primer storage tank, and Teflon spraying liquid mixed with a solvent is stored in the Teflon storage tank; the spraying module (4) is provided with two spray heads which are respectively used for spraying the primer and the Teflon coating.
5. The system for laser machining a superhydrophobic surface of claim 1, wherein:
the laser device is characterized by further comprising a control module (9), wherein the control module (9) is connected with the laser device (1), the laser galvanometer module (3), the spraying module (4), the irradiation mechanical arm module (5), the spraying mechanical arm module (6) and the rotating station (2), and the control module (9) is used for controlling the laser device (1), the laser galvanometer module (3), the spraying module (4), the irradiation mechanical arm module (5), the spraying mechanical arm module (6) and the rotating station (2);
the irradiation mechanical arm module (5) and the spraying mechanical arm module (6) are all 3-freedom-degree mechanical arms, and full-coverage spraying can be realized by matching with the rotating station (2).
6. A method for processing a superhydrophobic surface according to the system for laser processing a superhydrophobic surface of any one of claims 1-5, comprising the steps of:
step 1), flatly placing a material to be processed on the surface of the rotating station (2), and enabling the center of the surface to be processed of the material to be processed to coincide with the rotating center of the rotating station (2);
step 2) adjusting parameters of laser output by the laser (1): the pulse frequency is 1kHz, the pulse width is 200ns, and the output power is 500W; controlling the focusing lens (8) to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a defocusing spot is 5-10 mm; controlling an irradiation mechanical arm module (5) and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, repeating for 3 times, removing redundant grease on the surface of the material to be processed, and roughening the surface of the material to be processed;
step 3), spraying a primer on the surface of the material by using the spraying mechanical arm module (6), wherein the spraying thickness is more than 200 microns;
step 4), adjusting parameters of laser output by the laser (1): the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 200W; controlling the focusing lens (8) to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a defocusing spot is 5-10 mm; controlling an irradiation mechanical arm module (5) and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, repeating for 3 times to dry the primer on the surface of the material and roughen the surface of the primer, thereby improving the bonding effect of the subsequent Teflon coating spraying;
step 5), spraying a Teflon coating on the surface of the material by the spraying mechanical arm module (6), wherein the spraying thickness is more than 100 microns;
step 6) adjusting parameters of laser output by the laser (1): the pulse frequency is 5kHz, the pulse width is 200ns, and the output power is 100W; controlling the focusing lens (8) to be in a defocusing mode, so that the laser output by the galvanometer is defocused on the surface of the material, and the diameter of a light spot is 5mm to 10 mm; controlling an irradiation mechanical arm module (5) and a galvanometer to perform full-coverage irradiation on the surface of the material to be processed, and repeating for 3 times to dry the Teflon on the surface of the material;
step 7) adjusting output parameters of the laser (1): the pulse frequency is 60kHz, the pulse width is 1ns, and the output power is 100W; controlling a focusing lens (8) to be in a focusing mode, so that the laser output by the galvanometer is focused on the surface of the material; and controlling the irradiation mechanical arm module (5) and the galvanometer to perform full-coverage scribing on the surface of the material to be processed, wherein the line width is 10-30 microns, and the line center distance is 50-100 microns, so that the hydrophobic effect of the Teflon surface is improved.
7. The method of claim 6, wherein the primer is an epoxy zinc rich primer; the material to be processed is aluminum, iron or resin material.
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